Surah Ar Rahman Tafseer

فِيهَا فَاكِهَةٌ

Therein are fruits, (of various colors, taste and scent),

وَالنَّخْلُ ذَاتُ الاْاَكْمَامِ

and date palms producing Akmam.

Allah mentioned the date tree here specifically because of its benefit, both fresh and dry.

Ibn Jurayj reported that Ibn Abbas said said Al-Akmam, means

"sheathed fruit stalks."

Similar was said by more than one of the scholars of Tafsir, it refers to the stalks that the seeds grow in to become a cluster of dates, unripe green dates then they ripen and ripen more.

Allah said,

وَالْحَبُّ ذُو الْعَصْفِ وَالرَّيْحَانُ